Billionaire investor Warren Buffett of Omaha makes a rare public appearance during an autograph session outside Borsheim's Jewelry Store in Omaha, May 4. Buffett was signing autographs for shareholders in his company, Berkshire Hathaway, which is having its annual meeting May 5.

Billionaire businessman Warren Buffett sits with his wife Susan (R) and daughter Susie, prior to the annual Berkshire Hathaway shareholders meeting in Omaha, May 5. This marks a rare public appearance for the reclusive Buffett.

Arnold Schwarzenegger, Republican candidate for governor of California
in the October 7, 2003 recall election listens as world famous
investor, Warren Buffett (L), one of his financial advisors, speaks to
reporters after a meeting of Schwarzenegger's Economic Recovery Council
in Los Angeles August 20, 2003. REUTERS/Fred Prouser
FSP

Billionaire financier Warren Buffett looks on after a meeting with U.S. Senator Arlen Specter (R-PA) and chairman of the Senate Judiciary Committee, at the Hart Senate Office Building on Capitol Hill in Washington June 29, 2005. Specter is the co-author of a bill seeking to create a $140 billion asbestos compensation fund. REUTERS/Shaun Heasley SH/TC

Warren Buffett, chairman and CEO of Berkshire Hathaway, speaks at a Senate Finance Committee hearing about "Federal Estate Tax: Uncertainty in Planning Under the Current Law" on Capitol Hill in Washington, November 14, 2007. Billionaire Buffett warned of widening U.S. income disparity and endorsed the estate tax as a check on wealth accumulation, while two senior lawmakers said they want the tax repealed. REUTERS/Jason Reed (UNITED STATES)

Billionaire investor Warren Buffett laughs as he appears with Microsoft Corporation founder Bill Gates for a town hall style meeting with business students broadcast by financial television network CNBC at Columbia University in New York, November 12, 2009. REUTERS/Mike Segar (UNITED STATES BUSINESS)

Berkshire Hathaway Chairman Warren Buffett kisses his ukulele at the Berkshire Hathaway annual meeting in Omaha May 1, 2010. Buffett played "I've Been Working on the Railroad." REUTERS/Rick Wilking (UNITED STATES - Tags: BUSINESS TRANSPORT)

Billionaire Warren Buffett, wearing a traditional tikka or a red mark on the forehead, speaks during a news conference in Bangalore March 22, 2011. Buffett on Tuesday said he is looking to invest in large countries like India, China and Brazil, but added that restrictions on foreign ownership in India's insurance industry could be a deterrent. Buffett also said and the U.S. economy was improving and that the devastating earthquake in Japan would not hurt global growth. REUTERS/Stringer (INDIA - Tags: BUSINESS)

Berkshire Hathaway chairman Warren Buffett holds his hand over his heart during the singing of the national anthem, at the start of a 5km race sponsored by Brooks Sports Inc., a Berkshire-owned company, in Omaha May 5, 2013, a day after the company's annual meeting. Buffett at the meeting on May 4, 2013 gave the most extensive comments to date about the future of Berkshire Hathaway Inc after he is gone, saying he still expects the conglomerate to be a partner of choice for distressed companies. REUTERS/Rick Wilking (UNITED STATES - Tags: BUSINESS SPORT ATHLETICS)

Warren Buffett, Chairman of the Board and CEO of Berkshire Hathaway, poses for a portrait in New York October 22, 2013. REUTERS/Carlo Allegri (UNITED STATES - Tags: BUSINESS)

Roberta Buffett Elliott sits with her brother Warren Buffett as they attend an announcement ceremony at Northwestern University in Evanston, Illinois, January 28, 2015. The sister of financial investor Warren Buffett has given Northwestern University more than $100 million to create the Roberta Buffett Institute for Global Studies, the largest single gift in the school's 164-year history, the university said on Wednesday. REUTERS/Jim Young (UNITED STATES - Tags: BUSINESS EDUCATION SOCIETY)

"My deductions totaled $5,477,694, of which allowable charitable contributions were $3,469,179. All but $36,037 of the remainder was for state income taxes," he said.

"The total charitable contributions I made during the year were $2,858,057,970, of which more than $2.85 billion were not taken as deductions and never will be. Tax law properly limits charitable deductions," Buffett said.

Buffett said he had no problem releasing his tax information while under audit.

"Neither would Mr Trump - at least he would have no legal problem." (Reporting by Sruthi Shankar in Bengaluru; Editing by Ted Kerr)